Hot-air heating-stove.



no, 672,836. Patanfed'Apr. 23; |9101. y

J. F. FBEELAND.

HUT AIB HEATING STVE.

(Applicltion led Aug. 18, 1900.)

.. Mull" j *i I lull \"lllllm|lakC n l www" I i. W

x L, O A/I Il, f6 In!! Patented Apr. 23, |90I.

.L F. FBEELAND.

HUT AIB HEATING STVE.

l (Applimmn med Aug. 18,1900.)

2 Sheets-Sheet 2.

(In Model.)

WITNESSES A HNE YS ws Nonms Prrsns to, Pnm'auwof. wAsnmaToN, n, c4

UNITED STATES PATENT OFFICE.

JOHN F. FREELAND, OF BLOOMFIELD, INDIANA.

HOT-AIR HEATING-STOVE.

SPECIFICATION forming part of Letters Patent No. 672,836, dated April 23, 1901.

Application filed August 18, 1900. Serial No. 27,323. (No model.)

To all whom it may concern,.-

Be it known that l, JOHN F. FREELAND, a citizen of the United States,residin g at Bloomfield, in the county of Greene and State of Indiana, have invented certain new and usefulImprovements in Hot-Air Heating-Stoves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. A

This invention relates to stoves chieliy designed for heating and of the type having tubes through which air is circulated and heated to assist materially in warming the .room or apartment in which the heater is located. The stove is constructed so as to economize in the consumption of fuel and con# vert a maximum amount of caloric into available form for heating purposes.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference' is to be had to the appended description and drawings hereto attached.

While the essential and characteristic features of the invention are necessarily sus ceptible of modification, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a top plan View of the heater with the top plate removed. Fig. 2 is a perspective View of the upper portion of the heater, the top being omitted. Fig. 3 is a detail perspective view of the bottom of the heater on a smaller scale. Fig. 4 is a vertical section of the heater on the line X X of-Fig. 1. Fig. 5 is a vertical section about on the line Y Y of Fig. 1. Fig. 6 is ahorizontal section on the line Z Z of Fig. 4.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters. The heater in its general construction may present any form and be of any desired size, according to the space to be heated, and the body or shell 1 may be of any cross-sectional outline and, as shown, is ofv circular form. The top 2 and bottom 3 are secured to the up-y per and lower ends of the body in any selected Way and are provided with corresponding openings in vertical alinement for'the reception of tubes 4, through which the air to be heated circulates. The bottom 3 is depressed, as shown at 5, to form a chamber closed at its top side .by the plate or false bottom 6. An air-box 7 is located in the chamber 5 and is in communication therewith'by means of a damper-controlled opening 8. A pipe 9, extending from a point outside of the building or house, leads to the heater and communi- Cates with the air-box 7 at the point'lO and is provided with a damper 11 for controlling the admission of fresh air yto the stove. A slide 12, having an opening, is provided to control the opening 8 and is operated by means of a rod 13. 12 may be adjusted to close the opening 8 more or less or entirely shut off communica! tion between theair-box 7 and chamber 5. An opening 14 is formed in the depressed portion of the bottom at one end of the chamber 5 and is controlled by a damper 15. When the damper 15 is turned aside, the air contained in the lower portion of the room or apartment is adapted to pass freely into the chamber 5 and from thence into the box 7 when the opening 8 is uncovered, and thence from said box 7 into the body of the stove to support combustion ofthe fuel.

The plate 6, closing the top side of the chamber 5, is providedv with a series of openings 16 and with other openings at one end, from which the tubes 17 and 18 project vertically. The tube 18 extends to a higher level than the tube 17 and is provided with an elbow 19, lconnected therewith by a slip-joint and in such a manner as to swing horizontally, as indicated by the full and dotted lines in Fig. 1. A vertical tube 20 is located at the free end 0f the long arm of the elbow, so as to direct the inflowing air downward upon the fuel when the draft is supplied in this manner. When the elbow is turned to the position shown by the full lines in Fig. 1, the pendent portion 2O occupies a central position, thereby distributing the air uniformly over the fuel, and when the air is supplied to the fuel from below or When supplying fuel to the stove the elbow is turned out of the Upon operating the rod 13v the slide IOO way, as shown by the dotted lines in Fig. 1. The tube 17 is protected by a cowl 21, which is secured to the bottom plate 6 and is provided with openings 22 in its sides for the egress of air. A space exists between the top and sides of the tube 17 and cowl for the free passage of the air. The construction is such as to prevent ashes and cinders closing the tube 17 by banking thereon.

The chamber 5 is subdivided into two compartments by means of a partition 23, located near the front of the stove, and the front end compartment is again subdivided by a partition 24 into compartments 25 and 26, which have independent communication with the air-box by means of damper-controlled openings 27 and 28. The tube 17 is in communication with the compartment 25 and the tube 1S with the compartment 26. The slide 29, controlling the openings 27 and 23, is adapted to be operated by means of a rod 30 from without* the stove. In one position of the slide or damper 29 communication is established between the air-box 7 and the compartment 25 and communication between said air-box and the compartment 26 is cut off, and in another position of the said damper the opening 27 is closed and the opening 28 uncovered. This construction admits of supplying air to the fuel either from below or at a point from above, according to the required circulation and character of fuel to be burned.

The body of the stove is subdivided by vertical partitions 31, so as to form side spaces 32, through which the smoke and products of combustion may be caused to circulate after the fire has been started and a maximum amount of heat is required. The air-tubes 4 pass through the side spaces 32 and are supported at their ends in the top 2 and bottom These side spaces 32 are again divided by partitions 33, which fit snugly at their upper ends against the top 2, which terminate at their lower ends a short distance from the bottom 3 to provide spaces 34. Notches 35 and 36 are formed in the upper end of the partitions 31 upon opposite sides of the partitions 33, and the notches 35 are in communication with the combustion-chamber of the stove, whereas the notches 36 open into the smoke-box 37. The smoke-box 37 is located at the upper rear portion of the stove, and the smoke-pipe 38 is iu communication therewith for conveying the smoke and products of combustion to a convenient point of discharge. A damper-controlled opening 39 is provided in the bottom of the smoke-box 37, and the damper or slide 40 is operated by means of a rod 4l. A series of air-tubes 42 communicate at their lower ends with the chamber 5, exterior to the air-box 7, and pass vertically through the fire-box and combustion-chamber of the stove and connect with the top 2. These tubes 42 receive the air at their lower ends from the chamber 5 and discharge it crasse heated into the room or apartment. The' stove illustrated is of the type provided for burning wood, bagasse, and like fuel, and when coal is to be consumed a basket or grate (not shown) will be provided and located as may be found best adapted according to the style and character of the heater. Fuel is supplied to the stove through a door-controlled opening 43, and ashes and cinders are removed through the lower door-controlled opening 44. When startinga lire or a direct draft is desired, the damper 40 is opened and the damper 29 moved so as to permit air to pass from the air-box 7 into the compartment 25 and thence through the tube 17 and openings 22 of the cowl 21 in the bottom portion of the stove. After the fire has been fairly started and it is required to secure a maximum amount of heat the damper 40 is closed, thereby compelling the products of combustion to escape through the openings 35 and to pass downward through a side portion of the spaces 32, beneath the partition 33, thence upward through the other side portion of the spaces 32 and into the smoke-box 37 through the openings 36. The hot air and gases in making this circuitous path are deprived of the major part of their caloric, which is utilized for warming the tein perature of the room or apartment in the well -known manner, When starting the re, the damper 11 is closed, the damper 15 opened, and the damper 12 moved so as to establish communication between the chamber 5 and air-box 7, when the cold air from the room passes into the stove to support combustion. After the tire has been thoroughly started the damper 15 is closed and the damper 11 opened, thereby permitting cold air from the outside to en ter the stove and promote combustion, while at the same time the air is heated in its passage through the pipes 42 and passes out into the room. By closing the damper 15 the warm air of the roomis not utilized for draft purposes. Hence cold air does not tend to enter the room through crevices and spaces and doors and windows. When the damper 12 is moved so as to close the opening 8, air can not pass from the box 7into the chamber 5; but when said damper is open the chamber 5 is supplied with air from the box 7, and this air is utilized for heating by passing through the tubes 42.

It will be readily apparent that a great advan tage attained by this construction of hotair heater is that the draft can be regulated at will, so that the cold air entering the house can be utilized for combustion purposes and avoiding the utilization of the heated air of the room for draft purposes. A part of the cold air which enters the house through the pipe is passed through the tubes 42, as before described, and is emitted in a heated state. The tube 18, located above the fuel, not only furnishes a draft that will carry from the stove any unconsumed gases, but by fur- IOO IIC

nishing pure air when the tube 17 is closed or partly closed the greater part of the gases are consumed.

Having thus described the invention, what is claimed as new isl. In a heater, an air-box, independent compartments having valved communication with the air-box, tu bes having communication with the respective compartments and terminating at dierent levels within the stove to supply air to the fuel either from above or below the fuel, and a damper for establishing communication between said airbox and either one of the compartments connected therewith, substantially as set forth.

2. In a heater, an air-box, means for supplying air to the box either from the room or from a point without the building, independent compartments having damper-controlled communication with the air-box, tubes extending from the respective compartments to supply air to the re either from below or above, and a damper for controlling communication between the compartments and airbox, substantially as set forth.

3. In a heater, a chamber at the base of the stove, an air-box located in said chamber and having damper controlled communication therewith, tubes for supplying air to the fire 3o either above or below the same, and a damper for eecting communication between the said air-box and either one of said tubes, substantially as set forth.

4. In a heater of the character described, a chamber at the base of the stove and provided with an opening establishing communication between said chamber and the surrounding air, an air-box located in the cham ber and having damper-controlled communication therewith, independent compartments having damper-controlled comm nnication with the air-box, and tubes connected with the respective compartments and adapted to supply air to the re either at a point below or above the same, substantially as set forth.

5. In a heater of the character described, a chamber located at the base thereof, an airbox arranged in said chamber and having damper-controlled communication therewith, air-tubes passing through the heater and communicating with the chamber at the base thereof exterior to the air-box, and means for supplying air to the fire from the said airbox, as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN F. FREELAND. [L. S.] Witnesses:

LEALDAS S. FORBES, FRED N. MILLER. 

